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A member asked:

Treated canker sore with hydrogen peroxide and it got twice as big and painful. i've had the sore for 3 days now. what can i do?

A doctor has provided 1 answer
Dr. Paul Grin answered

Specializes in Pain Management

Canker sores: is the most common oral lesions. Most ulcers, infections will clear up by themselves within a week or two. You should see your GP or dentist if the ulcer gets worse or lasts for longer than 2 weeks. Best of luck.

Dr Kuitems agreed

Answered 2/27/2017

2.8k views

Thank

Related Questions

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3 weeks ago there was a tiny painful bump on the inside of my lip. It went away in 3 days but now there are 2. Its not a canker sore. What could it be?

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White spot like canker sore under tongue. Painful to talk, swallow, eat. Has been sore for 3 days now. What is it? Treatment?

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I had my teeth cleaned three days ago at the dentist. I never had a cold sore before, I have a canker sore now but I accidentally popped it when I touched it, it bled and now it looks like a small pimple. Is it possible it's my primary outbreak?

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A member asked:

Burning r side tongue & big tastebuds bilateral 4weeks. Saw Dr all ok. B12, folate, ferritin normal. Trying Biotine mouthwash. Had stomach flu 3 days ago& cold sore. Now small bump where tongue burns. Nervous tongue cancer. Or probable virus-canker??

3 doctors weighed in across 2 answers

A member asked:

Im 22, I have had this canker sore for about 2 weeks now and it doesn't look like it's healing or getting any smaller or less painful, is this normal?

A doctor has provided 1 answer

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